Arrhythmias Flashcards
1
Q
Causes of arrrhythmias
A
Afterpolarisations, Re-entry loops, Ectopic pacemaker activity
2
Q
List the classes of anti-arrhythmic drugs
A
Na channel blockers, B-blockers, K channel blockers, Ca channel blockers
3
Q
Describe the action of Na channel blockers as an anti-arrhythmic drug
A
Prevents depolarisation
4
Q
Describe the action of B-blockers as an anti-arrhythmic drug
A
Slow heart rate, decrease sympathetic input
5
Q
Describe the action of K channel blockers as an anti-arrhythmic drug
A
Increase refractory period slowing heart rate
6
Q
Describe the action of Ca channel blockers as an anti-arrhythmic drug
A
Decreases pacemaker depolarisation
